Volume No. 9 Issue No.: 3A Page No.: 822-826 January-March 2015

 

COMPARATIVE STUDY AND EFFECT OF PLANT (FRUIT PEEL) EXTRACTS (Musa sapientum AND Cucurbita maxima) TO INHIBIT CORROSION ON MILD STEEL BY USING 1N HCL

 

Koliyar J. G.* and Sheeba Aiman

Department of Environmental Science, SIES (Nerul) College of Arts, Science and Commerce, Nerul, Navi Mumbai, Maharashtra (INDIA)

 

Received on : October 23, 2014

 

ABSTRACT

 

An aqueous extract of Musa sapientum and Cucurbita maxima has been used as a corrosion inhibitor in controlling corrosion of carbon steel. The main constituent of Musa sapientum extract is gallocatechin and dopamine and that of Cucurbita maxima is phlobatannins and terpenoids. The paper reflects on the corrosion inhibition of mild steel in HCl solution in the presence of plant (fruit peel) extracts of Musa sapientum and Cucurbita maxima peel. Different concentrations of plant (fruit peel) extracts were made by using 1N HCL and mild steel plates were treated with these concentrations for 1,3,5 hours at 30,40 and 50 degree Celsius. Musa sapientum showed excellent efficiency at 300C with 93.56% inhibition efficiency at 15% concentration. Cucurbita maxima peels showed an increase in efficiency with increase in temperature. Highest inhibition efficiency was seen at 400C with efficiency of 97.03% at 15% concentration. Comparatively peel of Cucurbita maxima showed higher inhibition to corrosion than Musa sapientum. Hence we can conclude that peel of Cucurbita maxima acts as a better anticorrosive agent than banana. But both these extracts can be widely used as inner coating of walls of boilers and mild steel pipes. Musa sapientum extract anticorrosive agents can be used in industrial processes temperatures are controlled till 300C. Wheras Cucurbita maxima extract anticorrosive agents can be used in a wider scale of industrial processes with a broader temperature range. These extracts save money and save cost of waste management of Musa sapientum industries as well as industries which produce Cucurbita maxima products. A new breakthrough in use of these extracts in paints and varnishes can be applied by using heat resistant ingredients doped with these natural inhibitors to protect these heat labile plant (fruit peel) extracts to degenerate due to increased temperature thus increasing their use in processes involving high temperatures

 

Keywords : Corrosion, Musa sapientum, Cucurbita maxima, Inhibition efficiency, Natural inhibitors

 

 

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